Poor service delivery

Meds are ordered via sms every month. I get a return sms to advise that formulary has changed and I must make a co-payment within 48 hours before delivery. I have not received any notification from Discovery to tell me that this is the case, neither do I know what I am making a co-payment for. Surely I should be given a courtesy call to advise me of this. change and seek an alternative from my doctor.